The two men share a law firm. "Our clients just want the discrimination laws applied fairly," says Chris Cauble, one of the lawyers representing both men. "About 20 states include age in their public accommodation laws. It does not matter that they can buy guns somewhere else. That's not a defense to discrimination."

Here's how the two young men tried and failed to buy guns and ammunition in Oregon:

What: Watson tried to buy a .22-caliber Ruger 10/22 rifle. When: March 3 Where: Walmart in Grants Pass What the store says: "In light of recent events, we reviewed our policy on firearm sales," a Walmart spokesman said in a statement. "As a result, we raised the age restriction for the purchase of firearms and ammunition to 21 years of age. We stand behind our decision and plan to defend it. We will respond as appropriate with the Court." Who: Airion Grace, 20, of Washington County What: Grace tried to buy shotgun cartridges. When: March 6 Where: Bi-Mart in Hillsboro What the store says: Bi-Mart did not return requests for comment. What: Grace tried to buy shotgun cartridges. When: March 6 Where: Fred Meyer in Hillsboro, three miles east of the Bi-Mart What the store says: Fred Meyer did not return requests for comment.